Question
a.
It is the responsibility of the Transact-SQL programmer to issue COMMIT TRANSACTION only at a point when all data referenced by the transaction is logically correct
b.
The Database Engine increments the transaction count within a statement only when the transaction count is 1 at the start of the statement
c.
You cannot roll back a transaction after a COMMIT TRANSACTION statement is issued
d.
COMMIT transaction requires membership in the public role
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